A high-throughput gas chromatography-mass spectrometry method was established for the analysis of 54 pesticide residues in milk.Samples were extracted with acetonitrile while shaking,and the extract was concentrated and purified using solid-phase extraction(SPE)on a C18 column using acetonitrile as the eluent.The external standard method was used for quantification.The results showed that good linearity was observed over the concentration range from 0 to 1.00 μg/mL,with correlation coefficient(R2)greater than 0.990.Recoveries were between 43.33%and 113.87%with a relative standard deviation(RSD)of 1.8%-19.8%(n=6).This method is accurate,simple and suitable for large numbers of milk samples.
关键词
气相色谱-质谱法/固相萃取/牛乳/农药残留/高通量
Key words
gas chromatography-mass spectrometry/solid-phase extraction/milk/pesticide residues/high throughput
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